Well... it turns out that OW won't let you copy the text of the Baker material, but I was able to assemble screen shots of the pictorial data provided (attached).
Concerning the rock wool mini-cubes, that's a reflection of my current business approach. When I was in PA, I was more-or-less a "full line" type of operation, carrying over 300 different items. Now that I am retired and have significantly downsized (I went from 5000 square feet of supplies storage to 75), I only carry the handful of products I use, buying them in sufficient quantity to pay wholesale and have some available to the public.
I have a few gallons of mini-cubes set aside for my own use, and likely won't reorder (thereby having enough to sell) for a while.